import numpy as np
a = np.array([
    [0, 0, 0],
    [10, 10, 10],
    [20, 20, 20],
    [30, 30, 30]
])
print(a.shape)
b =np.array([0, 1, 2])
print(b.shape)
c = np.array([[1], [2], [3], [4]])
print(c.shape)
print(a+c)
print((a+c).shape)
print(a+b)
print((a+b).shape)
